Manchester City goalkeeper Ederson believes the club are suffering due to the injury suffered by center back Aymeric Laporte.
Pep Guardiola's side have struggled to keep teams out after Laporte's injury, as they have to rely on Nicolas Otamendi, John Stones or Fernandinho as central defenders.
They were exposed by Wolves in a 2-0 home loss in the Premier League, which puts them eight points behind Liverpool.
Ederson told reporters: "It's very difficult for a team like us having injuries, especially if they all happen in the same position on the pitch.
"We all know about the amazing quality of Aymeric and how good he is in the build-up phase. Of course we are missing him.
"We have other great players who can replace him in that position.
"Unfortunately, with the injury to John Stones, we have only one natural centre-back.
"I think the team needs to be mentally strong to carry on playing and winning in the championship."
